Improvement in materials for packing and bearings



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ELIZA D. MURFEY, OF NEW YORK, N. Y.

Letters Patent No. 108,286, dated October 11, 1870.

llVIFfROVEMEN IN MATERIALS FOR PACKING AND BEARINGS.

The Schedule referred to in these Letters Patent and making part of thesame.

. I, ELIZA. D. MURFEY, of New York, 'county of New York, State of NewYork, have'iuvented an improved Packing and Bearing Material, of whichthe following is a specification. 7 Nature and Object of the Invention.

My invention consists of felt impregnated with plumbago, soapstone, orequivalent substances, as described hereafter, (and condensed, ifrequired,) to produce a substitute for the usual packing or bearingmaterials.

Packiugsaud bearings consisting of mixtures of insoluble substances in acomminuted state, while they with a suitable material or composition,(audcom press, if riccessary,) forming the packing or bearing desired.

The felt may be of any desired thickness, and the impregnating materialmay consist of powdered or com-minuted plumbago, burnt hair, asbestos,or any other substance or composition which may be found eifioient.

The commiuuted insoluble substance or substances may bethoroughlycombined with the felt by introducing the latter into a vesselcontaining a mixture of the said substance, and melted parafiiue, or itsequivalent, andsubjeoting the whole to excessive atmospheric pressure,the paraffiue being afterward extracted by heat, or pressure, or both.

The impregnated felt may be employed in sheets for packing joints; itmay be cut into blocks or rop'es for use in stufling boxes, or it may becondensed or molded under excessive pressure to form hard solid blocksfor bearings, 86G.

Inasmuch as the, fibers are thoroughly united by the felting processbefore the application of the impregnatingmaterial, the packing orbearing will not become disintegrated underjt-he influence of heat,pressure, or moisture, as those made in a different manner are apt todo.

I claim as a new manufacture- 1.- A material for packing, 850.,consisting .of felt impregnated with com'minuted substances orcompositions, as described.

2. A. material for bearings, 800., consisting of the said impregnatedfelt condensed under pressure.

If! testimony whereof, I have signed my name to this specification inthep o'sence of two subscribing witnesses.

E. D. MURFEY.

Witnesses THOMAS Penman, H. MoMAuUs.

